CN107946745A - Multi-frequency antenna - Google Patents

Multi-frequency antenna Download PDF

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Publication number
CN107946745A
CN107946745A CN201710952766.3A CN201710952766A CN107946745A CN 107946745 A CN107946745 A CN 107946745A CN 201710952766 A CN201710952766 A CN 201710952766A CN 107946745 A CN107946745 A CN 107946745A
Authority
CN
China
Prior art keywords
section
frame portion
multifrequency antenna
tie point
antenna
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710952766.3A
Other languages
Chinese (zh)
Inventor
黄金鼎
谢国豪
郑东庭
陈怡颖
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pegatron Corp
Original Assignee
Pegatron Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pegatron Corp filed Critical Pegatron Corp
Publication of CN107946745A publication Critical patent/CN107946745A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/10—Resonant antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way

Abstract

A multi-frequency antenna comprises a conductive shell, a feed-in element and a connecting element. The conductive shell comprises a first frame part and a shell structure. The first frame portion has first to third connection points. The feeding element is divided into a first feeding part and a second feeding part based on the feeding point. The first feed-in part is electrically connected with the first connection point, and the second feed-in part is electrically connected with the second connection point. The connecting element is electrically connected between the third connecting point and the shell structure. The first feed-in portion, the first frame portion and the connecting element form a first antenna structure, and the second feed-in portion, the first frame portion and the connecting element form a second antenna structure and a third antenna structure, so that the multi-frequency antenna operates in first to third frequency bands.

Description

Multifrequency antenna
Technical field
The present invention relates to a kind of antenna, and more particularly to a kind of multifrequency antenna of combination conductive shell.
Background technology
In recent years, mobile communications device (for example, smart mobile phone and tablet computer) is mostly using outer with metal material Design (for example, metal back cover) is seen to attract the sight of consumer.In addition, radio communication device now is even more that it is internal Antenna is combined with metal back cover, to contribute to the micromation of radio communication device.In general, arround antenna tends to be subject to The influence of metal object, therefore the antenna combined with metal back cover often has relatively narrow bandwidth.To solve the above-mentioned problems, it is existing It is to increase the operation frequency range of antenna using the setting of switch element mostly to have technology, and then causes antenna to have multi-band operation Characteristic.However, such a practice often increases the production cost of antenna and reduces the gain of antenna.
The content of the invention
The present invention provides a kind of multifrequency antenna, can pass through the first section in the first frame portion and the second section, the first feedback Enter portion and connecting element forms first antenna structure, and the 3rd section in the first frame portion and the 4th section, second can be passed through Feeding portion and connecting element form the second antenna structure, more can by the 3rd section in the first frame portion, the second feeding portion and Connecting element forms third antenna structure.Thus, multifrequency antenna will be operable in the first to the 3rd frequency range, so as to reduce multifrequency The production cost of antenna, and the gain of multifrequency antenna can be increased.
The multifrequency antenna of the present invention includes conductive shell, feed-in element and connecting element.Conductive shell includes separated the One frame portion and shell structure.First frame portion is divided into first based on the first tie point, the second tie point and the 3rd tie point Section, the second section, the 3rd section and the 4th section, and the 3rd tie point is between the first tie point and the second tie point. Feed-in element includes the load point for receiving FD feed, and is divided into the first feeding portion and the second feeding portion based on load point.The One feeding portion is electrically connected the first tie point, and the second feeding portion is electrically connected the second tie point.One end of connecting element is electrical The 3rd tie point is connected, and the other end of connecting element is electrically connected shell structure.First feeding portion, the first section, the secondth area Section forms first antenna structure with connecting element, to cause multifrequency antenna operation in the first frequency range.Second feeding portion, the 3rd area Section, the 4th section and connecting element form the second antenna structure, to cause multifrequency antenna also to operate in the second frequency range.Second feed-in Portion, the 3rd section and connecting element form third antenna structure, to cause multifrequency antenna also to operate in the 3rd frequency range.
In one embodiment of this invention, above-mentioned first antenna structure and the second antenna structure are respectively a reversed F-typed day Cable architecture, and third antenna structure is a loop aerial structure.
It can pass through first to the first to the 3rd frequency range of third antenna structure operation based on above-mentioned, of the invention multifrequency antenna. In other words, multifrequency antenna need not set switch element to have the characteristic of multi-band operation, so as to help to reduce multifrequency antenna Production cost can simultaneously increase the gain of multifrequency antenna.
To make the foregoing features and advantages of the present invention clearer and more comprehensible, special embodiment below, and it is detailed to coordinate attached drawing to make Carefully it is described as follows.
Brief description of the drawings
Fig. 1 is the schematic diagram of the multifrequency antenna according to one embodiment of the invention；
Fig. 2 is the schematic diagram of the multifrequency antenna according to another embodiment of the present invention；
Fig. 3 is the reflection loss figure of the multifrequency antenna according to one embodiment of the invention；
Fig. 4 is gain of the multifrequency antenna under the first frequency range according to one embodiment of the invention；
Fig. 5 is the multifrequency antenna according to one embodiment of the invention in the second frequency range and the gain under the 3rd frequency range；
Fig. 6 is the schematic diagram of the conductive shell according to another embodiment of the present invention.
Embodiment
Fig. 1 is the schematic diagram of the multifrequency antenna according to one embodiment of the invention.As shown in Figure 1, multifrequency antenna 100 includes leading Electric housing 110, feed-in element 120 and connecting element 130.Wherein, conductive shell 110 can be for example mobile communications device (example Such as, smart mobile phone, tablet computer and laptop) in the back-cover that is made of conductive material, and the conductive material can example Hardware or carbon fiber element etc. in this way.In other words, in one embodiment, conductive shell 110 can be for example mobile communication The metal back cover of device.
Specifically, conductive shell 110 includes conductive cover 140 and conductive bezels 150.Wherein, 150 ring of conductive bezels It is wound on around conductive cover 140, to form multiple side walls of conductive shell 110.Conductive bezels 150 are separated by gap 101 Into the first frame portion 151 and the second frame portion 152 being separated from each other, and the first frame portion 151 and conductive cover 140 also by Gap 101 is separated into the two elements being separated from each other.Second frame portion 152 is connected with each other with conductive cover 140, and then can form a shell Body structure.In addition, gap 101 is arranged between the shell structure and the first frame portion 151, with cause the shell structure with First frame portion 151 is separated from each other.
Further to seeing, the first frame portion 151 is equipped with first to the 3rd tie point P11~P13, and the 3rd tie point P13 is between the first tie point P11 and the second tie point P12.In addition, the first tie point P11 in the first frame portion 151 with Second tie point P12 is electrically connected to the both ends of feed-in element 120, and the 3rd tie point P13 in the first frame portion 151 passes through Connecting element 130 is electrically connected to shell structure (for example, conductive cover 140).That is, one end of connecting element 130 electrically connects The 3rd tie point P13 is connected to, and the other end of connecting element 130 is electrically connected to shell structure (for example, conductive cover 140). Thus, feed-in element 120, the first frame portion 151 and connecting element 130 can form mutiple antennas structure, and then cause more Frequency antenna 100 is operable in multiple frequency ranges.
For example, Fig. 2 is the schematic diagram of the multifrequency antenna according to another embodiment of the present invention.As shown in Fig. 2, feed-in is first Part 120 includes load point FP1, and can be divided into the first feeding portion 211 and the second feeding portion 212 based on load point FP1.Wherein, First feeding portion 211 is electrically connected the first tie point P11 in the first frame portion 151, and the second feeding portion 212 is electrically connected the The second tie point P12 in one frame portion 151.In addition, the first frame portion 151 has two open ends 1511 and 1512, and first Frame portion 151 can be divided into first to fourth section 221~224 based on first to the 3rd tie point P11~P13.
It is worth noting that, the first feeding portion 211, the first frame portion 151 can form first antenna knot with connecting element 130 Structure, to cause multifrequency antenna 100 to be operable in the first frequency range.For example, the first section 221, the feedback of the second section 222, first An inverted F shaped antenna (Inverted F Antenna) structure (that is, first antenna knot can be formed by entering portion 211 and connecting element 130 Structure).In addition, the first section 221 and the second section 222 can form the resonance path 201 in inverted F shaped antenna structure, and road of resonating Footpath 201 is the first open end 1511 that the first frame portion 151 is extended to from connecting element 130.In other words, in one embodiment, First antenna structure can be for example inverted F shaped antenna structure, and the summation of the length of the first section 221 and the second section 222, that is, 1/4 wavelength of the length of resonance path 201, the about low-limit frequency of the first frequency range.
On the other hand, the second feeding portion 212, the first frame portion 151 and connecting element 130 can be formed the second antenna structure with Third antenna structure, to cause multifrequency antenna 100 also to operate in the second frequency range and the 3rd frequency range.For example, the 3rd section 223rd, the 4th section 224, the second feeding portion 212 and connecting element 130 can form an inverted F shaped antenna structure (that is, the second antenna Structure).In addition, the 3rd section 223 and the 4th section 224 can form the resonance path 202 in inverted F shaped antenna structure, and resonate Path 202 is the second open end 1512 that the first frame portion 151 is extended to from connecting element 130.In other words, in an embodiment In, the second antenna structure also can be for example inverted F shaped antenna structure, and the 3rd section 223 and the length of the 4th section 224 is total With, that is, 1/4 wavelength of the length of resonance path 202, the about low-limit frequency of the second frequency range.
In addition, the 3rd section 223, the second feeding portion 212 can form a loop aerial (loop with connecting element 130 Antenna) structure (that is, third antenna structure).In addition, the 3rd section 223, the second feeding portion 212 can with connecting element 130 The resonance path 203 in loop aerial structure is formed, and resonance path 203 is to extend to connecting element 130 from load point FP1. In other words, in one embodiment, third antenna structure can be for example loop aerial structure, and the 3rd section 223, the second feeding portion 212 with the summation of the length of connecting element 130, that is, the 1/ of the length of resonance path 203, the about low-limit frequency of the 3rd frequency range 2 wavelength.
In other words, the multifrequency antenna 100 being combined with conductive shell 110, can pass through feed-in element 120, connecting element 130 And the first frame portion 151 in conductive shell 110 forms mutiple antennas structure, so that the characteristic with multi-band operation.Thus, With the prior art in comparison, multifrequency antenna 100 is without the characteristic for setting switch element to have multi-band operation, so as to help It can simultaneously increase the gain of multifrequency antenna 100 in the production cost for reducing multifrequency antenna 100.
Further to seeing, as shown in Figures 1 and 2, multifrequency antenna 100 further includes extending element 160 and substrate 170. In one embodiment, extending element 160 can be sheet metal, but the present invention is not limited.Wherein, feed-in element 120 and extension member Part 160 is arranged on substrate 170, and substrate 170 faces conductive cover 140.In other words, feed-in element 120 is on substrate 170 Orthographic projection of the orthographic projection with conductive cover 140 on substrate 170 is overlapped.Extending element 160 is electrically connected the second feeding portion 212, and there is an angle between 160 and second feeding portion 212 of extending element.In other words, extending element 160 and feed-in element 120 in Different Plane, such as：Extending element 160 can be for example parallel X-Z plane, and feed-in element 120 can be for example it is flat Row is in X-Y plane.That is, extending element 160 can be for example the top for being erected at feed-in element 120, or extending element 160 hangs down Directly in feed-in element 120.In addition, extending element 160 can increase the swept area of multifrequency antenna 100.Thus, extending element 160 It will can increase radiation efficiency of the multifrequency antenna 100 under the second frequency range and the 3rd frequency range, so as to further lift multifrequency antenna 100 gain.
For example, Fig. 3 is reflection loss (return loss) figure of the multifrequency antenna according to one embodiment of the invention, Fig. 4 is gain of the multifrequency antenna under the first frequency range according to one embodiment of the invention, and Fig. 5 is according to one embodiment of the invention Gain of the multifrequency antenna under the second frequency range and the 3rd frequency range.Operationally, as shown in Figure 1, the load point of multifrequency antenna 100 FP1 can receive the FD feed from signal source 180.For example, the load point FP1 of multifrequency antenna 100 can pass through coaxial cable Signal source 180 is electrically connected to, and signal source 180 can be for example the transceiver in mobile communications device.Thus, multifrequency antenna 100 will can receive the FD feed from transceiver by coaxial cable.
As shown in Figure 3 and Figure 4, under the excitation of FD feed, multifrequency antenna 100 can produce position by first antenna structure In the first resonance mode 310 of the first frequency range, and multifrequency antenna 100 has good gain under the first frequency range.In addition, as schemed Shown in 3 and Fig. 5, multifrequency antenna 100 can produce the second resonance mode 320 positioned at the second frequency range by the second antenna structure, and Can by third antenna structure produce positioned at the 3rd frequency range the 3rd resonance mode 330, and multifrequency antenna 100 the second frequency range with There is good gain under 3rd frequency range.Furthermore the first antenna structure of multifrequency antenna 100 frequency tripling mode 340 (that is, Three order harmonics) more adjacent to the 3rd resonance mode 330, so as to further lift the bandwidth of multifrequency antenna 100.Thus, such as Shown in Fig. 3, under using the reflection loss of -4dB as standard, that is, with 4.5：1 voltage standing wave ratio (Voltage Standing Wave Ratio, abbreviation VSWR) it is that multifrequency antenna 100 can be covered under C2K/EGPRS/UMTS/LTE communication standards under standard Operation frequency range.
It is noted that as shown in Fig. 2, insulated wire 230 may be provided in the gap 101 of conductive shell 110, with linking Or support mutually separated first frame portion 151 and shell structure.In addition, two conductive sheets 241 of the first frame portion 151 with 242 may be provided on insulated wire 230, and the both ends of feed-in element 120 can be electrically connected to the first side by screw 251 and 252 Two conductive sheets 241 and 242 of frame portion 151, so as to increase stability of the multifrequency antenna 100 in assembling.Connecting element 130 can be horizontal Across the outside of insulated wire 230, such as：Connecting element 130 can extend to the side wall of insulated wire 230 from the top surface of insulated wire 230. Thus, the conductive cover 140 of the side wall of the first frame portion 151 of the top surface of neighbouring insulated wire 230 and neighbouring insulated wire 230 will It can be electrical connected each other by connecting element 130.In another embodiment, connecting element 130 can also be embedded in the exhausted of part In edge line 230, and it is electrically connected the first frame portion 151 and conductive cover 140.
It is noted that in another embodiment, the gap 101 in conductive shell 110 can also be set directly at conduction On frame 150.For example, Fig. 6 is the schematic diagram of the conductive shell according to another embodiment of the present invention.It is as shown in fig. 6, conductive Housing 60 includes conductive cover 610 and conductive bezels 620.In addition, conductive bezels 620 are broken into what is be separated from each other by gap 601 First frame portion 621 and the second frame portion 622, and the second frame portion 622 is connected with each other with conductive cover 610.In other words, from another From the point of view of one angle, the second frame portion 622 of interconnection can form a shell structure with conductive cover 610.In addition, and Fig. 1-2 Embodiment similarly, can set first to the 3rd tie point P61~P63 in the first frame portion 621.In addition, the first frame portion 621 On the first tie point P61 and the second tie point P62 can be electrically connected to the both ends of feed-in element 120, and the first frame portion 621 On the 3rd tie point P63 shell structure (for example, second frame portion 622) can be electrically connected to by connecting element 130.By This, feed-in element 120, connecting element 130 and the first frame portion 621 in conductive shell 60 can form mutiple antennas structure.
In conclusion the multifrequency antenna of the present invention can pass through the first side in feed-in element, connecting element and conductive shell Frame portion forms first antenna structure, the second antenna structure and third antenna structure, so as to cause multifrequency antenna to have multi-band operation Characteristic.In other words, with the prior art in comparison, multifrequency antenna need not set switch element can the spy with multi-band operation Property, so as to contribute to the production cost of reduction multifrequency antenna simultaneously to increase the gain of multifrequency antenna.
Although the present invention is disclosed as above with embodiment, so it is not limited to the present invention, any technical field Middle technical staff, without departing from the spirit and scope of the invention, when can make a little variation and retouching, therefore the protection of the present invention Scope is when subject to those as defined in claim.

Claims (10)

  1. A kind of 1. multifrequency antenna, it is characterised in that including：
    Conductive shell, including separated first frame portion and shell structure, first frame portion are based on the first tie point, second Tie point and the 3rd tie point are divided into the first section, the second section, the 3rd section and the 4th section, and the 3rd tie point Between first tie point and second tie point；
    Feed-in element, including the load point of FD feed is received, and the first feeding portion and second are divided into based on the load point Feeding portion, first feeding portion is electrically connected first tie point, and second feeding portion is electrically connected described second Tie point；And
    Connecting element, its one end are electrically connected the 3rd tie point, and described in the other end electric connection of the connecting element Shell structure,
    Wherein, first feeding portion, first section, second section and the connecting element form first antenna knot Structure, to cause the multifrequency antenna operation in the first frequency range, second feeding portion, the 3rd section, the 4th section The second antenna structure is formed with the connecting element, to cause the multifrequency antenna also to operate in the second frequency range, and described second Feeding portion, the 3rd section and the connecting element form third antenna structure, to cause the multifrequency antenna also to operate 3rd frequency range.
  2. 2. multifrequency antenna according to claim 1, it is characterised in that a gap setting first frame portion with it is described Between shell structure, to separate first frame portion and the shell structure, and an insulated wire is arranged in the gap.
  3. 3. multifrequency antenna according to claim 2, it is characterised in that the shell structure includes the second side being connected with each other Frame portion and conductive cover, second frame portion and the conductive cover by the gap respectively with the first frame portion phase Mutually separation, and the connecting element be electrically connected at the conductive cover and first frame portion the 3rd tie point it Between.
  4. 4. multifrequency antenna according to claim 2, it is characterised in that the shell structure includes the second side being connected with each other Frame portion and conductive cover, second frame portion is separated from each other by the gap and first frame portion, and the connection Element is electrically connected between second frame portion and the 3rd tie point of first frame portion.
  5. 5. multifrequency antenna according to claim 1, it is characterised in that the first antenna structure and second day knot Structure is respectively inverted F shaped antenna structure, and the third antenna structure is loop aerial structure.
  6. 6. multifrequency antenna according to claim 1, it is characterised in that the length of first section and second section Summation for first frequency range low-limit frequency 1/4 wavelength.
  7. 7. multifrequency antenna according to claim 1, it is characterised in that the length of the 3rd section and the 4th section Summation for second frequency range low-limit frequency 1/4 wavelength.
  8. 8. multifrequency antenna according to claim 1, it is characterised in that the 3rd section, second feeding portion and institute The summation for stating the length of connecting element is 1/2 wavelength of the low-limit frequency of the 3rd frequency range.
  9. 9. multifrequency antenna according to claim 1, it is characterised in that further include：
    Extending element, is electrically connected second feeding portion, and forms angle, and the extending element with second feeding portion Increase radiation efficiency of the multifrequency antenna under second frequency range and the 3rd frequency range.
  10. 10. multifrequency antenna according to claim 9, it is characterised in that further include substrate, and the feed-in element with it is described Extending element is set on the substrate.
CN201710952766.3A 2016-10-13 2017-10-13 Multi-frequency antenna Pending CN107946745A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TW105133003A TWI632737B (en) 2016-10-13 2016-10-13 Multi-band antenna
TW105133003 2016-10-13

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CN107946745A true CN107946745A (en) 2018-04-20

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Application Number Title Priority Date Filing Date
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TW (1) TWI632737B (en)

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CN109713446A (en) * 2018-12-29 2019-05-03 瑞声精密制造科技(常州)有限公司 Transmission line mould group, antenna modules and mobile terminal
CN111509374A (en) * 2019-01-31 2020-08-07 北京小米移动软件有限公司 Terminal device

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CN109713446A (en) * 2018-12-29 2019-05-03 瑞声精密制造科技(常州)有限公司 Transmission line mould group, antenna modules and mobile terminal
CN111509374A (en) * 2019-01-31 2020-08-07 北京小米移动软件有限公司 Terminal device

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TW201814963A (en) 2018-04-16

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